Answer :
Final answer:
The M.A.I.N. causes of WWI were militarism, alliances, imperialism, and nationalism, all contributing to the outbreak of conflict in Europe. The United States entered the war due to unrestricted submarine warfare by Germany and the interception of the Zimmermann Telegram, among other factors. These events shifted public sentiment and led to a formal declaration of war in 1917.
Explanation:
M.A.I.N. Causes of WWI
The term M.A.I.N. represents the four main causes of World War I: Militarism, Alliances, Imperialism, and Nationalism.
- Militarism: This refers to the arms race and the build-up of military forces among the major powers of Europe. Countries such as Germany and Britain expanded their navies, which increased tensions.
- Alliances: The complex system of alliances created a situation where a conflict between two countries could quickly involve others. The most notable alliances included the Triple Alliance (Germany, Austria-Hungary, and Italy) and the Triple Entente (France, Russia, and Britain).
- Imperialism: Competition for colonies and global dominance led to rivalries and conflicts among European nations. For instance, Germany’s aggressive expansion in Africa stirred resentment among established powers like Britain and France.
- Nationalism: Intense national pride and ethnic tensions contributed to the outbreak of war. The desire for Slavic independence from Austria-Hungary was a significant factor, illustrated by the assassination of Archduke Franz Ferdinand by a Serbian nationalist.
Factors Leading the United States to Enter WWI
The United States initially maintained a policy of neutrality, but several factors influenced its decision to enter WWI in 1917. One significant factor was unrestricted submarine warfare by Germany, which targeted American and neutral ships. The sinking of the Lusitania, a British passenger liner, in 1915, resulted in the deaths of 128 Americans and stirred public outrage. Additionally, the interception of the Zimmermann Telegram in early 1917 revealed Germany's proposal for Mexico to join the war against the U.S. This revelation alarmed Americans and shifted public opinion toward supporting entry into the conflict. Ultimately, these factors combined with economic interests and a desire to ensure a favorable post-war order propelled the U.S. to formally declare war on Germany on April 6, 1917.
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